It wasn't peaceful. Madrid's City Council has been pressing the protestors for days, because they wanted to start building Christmas decoration in the area, and the protestors were not ok with leaving.
Seems like they finally got an order to drop police against them.
The Els Alfacs (Tarragona, Catalonia) road.
As you can see in the pic, it's not the middle of nowere but a road following the coast with urbanizations around.
During the 70s, a truck transporting propylene crashed on camping wall, besides the road, exploding and killing 215 people.
Since that, drivers passing through that road, claim to see human silhouettes, besides the area of the crash, like silent witness looking at the road.